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Showing posts with label LCS. Show all posts
Showing posts with label LCS. Show all posts

Saturday, 26 July 2014

Observed Time Difference Of Arrival (OTDOA) Positioning in LTE

Its been a while I wrote anything on Positioning. The network architecture for the positioning entities can be seen from my old blog post here
Qualcomm has recently released a whitepaper on the OTDOA (Observed Time Difference Of Arrival) positioning. Its quite a detailed paper with lots of technical insights.

There is also signalling and example of how reference signals are used for OTDOA calculation. Have a look at the whitepaper for detail, embedded below.



Monday, 14 May 2012

Location Services in LTE Networks

Recently made a combined architecture of LTE with LCS and MBMS and posted it here. This document from MSF below looks at the LoCation Services (LCS) in detail.

Friday, 11 May 2012

Updated LTE Architecture with LCS and MBMS entities

Here is an attempt to update the LTE Architecture with MBMS and Location Services (LCS) entities included



You can also refer to the following old posts:



Tuesday, 12 July 2011

Couple of presentations on GNSS and LCS

I came across couple of presentations from International Conference on Localization and GNSS, held in Tampere, Finland, June 29-30, 2011

This first presentation by Lauri Wirola of Nokia gives good summary of standardized positioning technologies in use today. It also lists the difference between control plane and user plane positioning. The 3GPP based positioning from Rel 5 to Rel 8 has been listed. Overall a very interesting presentation.

The second presentation by Ignacio Fernández Hernández of the European Commission, gives an overview of the EU satnav programmes (Galileo, EGNOS) and current R&D status; Present some numbers and findings of the overall GNSS R&D panorama in EU and abroad; Present some trends and challenges in location technologies for the following years. Another interesting presentation I think.